Black Mountain, NC 28770 Frost Dates
Frost dates for Black Mountain, NC, ZIP 28770
The last spring frost here typically falls around 04/19, about 234 days from today. The first fall frost typically arrives around 10/23, about 184 frost-free days later.
Zone 7a (0 to 5°F average annual minimum) comes from the USDA Plant Hardiness Zone Map; the frost dates above are the 1991-2020 normal at the nearest reporting NOAA station for Black Mountain, not a forecast for this year.
What to do before the first frost
Zone 7a around Black Mountain has about 8 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
The actual range around Black Mountain's last frost
04/19 is the middle of 30 years of NOAA records, not a promise. Plant by 04/04 and you're betting against frost in roughly 9 years out of 10. 05/07 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Black Mountain compares
Black Mountain's growing season runs about 184 days, ranking 23,485 of 40,283 US ZIP codes measured here, longest to shortest. Within NC, it ranks 1,003 of 1,078.
Learn more
zone vs. frost date explains why Zone 7a and Black Mountain's frost date answer different questions, and the frost range explains how to read the range around Black Mountain's dates instead of trusting one.